Abstract: The present invention relates to a method for adding background sound to mobile communication telephone talking and a communication system thereof. In the method of the present invention, a background sound system is added into corresponding talk at the time of establishing a talking link between the calling mobile communication terminal and the called mobile communication terminal based on contracting information of calling and/or called parties. In the communication system of the present invention, one or more than one background sound service system is introduced into conventional communication system, The background sound service system comprises at least a switching device, a background sound storage device, a background sound playing device and a control device that are connected to each other.

Abstract: A method for adding a background tone to a call includes: triggering a background tone service, according to a preset triggering mechanism, upon receipt of a call from a calling subscriber to a called subscriber; establishing a three-party call among the calling subscriber, the called subscriber, and the background tone service platform, and playing, by the background tone, a background tone service platform. A system for implementing a background tone service includes an exchange and a background tone service platform. By applying embodiments of the present invention, subscribers can communicate with each other and enjoy the background tone, which is more interesting.